Sounds like your memory doesn't exist beyond a post or two. What I said was that the back light bleed issue in edge lit displays is inherent to current LCD technology and assembly. You've certainly kept track of most of my postings, so you of all people should know what I've said over and over again. And it goes without saying that my response was completely laden with sarcasm. Is that a trait that you can't pick up either? Maybe that's why you are easily swayed by the Apple store managers.
LOL..go ahead and exchange everyday if they allow it. Surely you know the definition of insanity. Doing the same thing over and over again and expecting a different result. Besides, you are just wasting your own time, which if you are spending that much of it wandering around an Apple store, is not that valuable anyway.
Oh yeah, per your request, here's your proof in terms of Apple's new serial number format. This is a 2010 Macbook article, but doesn't need a genius to decipher application to many new Apple devices. Specifically it states that "Next year, (meaning 2011) we will see the use of codes F and G, and so on." Feel free to provide your own 'proof' stating otherwise. I won't hold my breath.
http://ipad.headlinestimes.com/ipad-widgets/apple-tweaks-serial-number-format-with-new-macbook-pro/